CN213217309U

CN213217309U - Nail and rod retractor for posterior lumbar interbody fusion

Info

Publication number: CN213217309U
Application number: CN202021295191.6U
Authority: CN
Inventors: 陈振中; 何登伟; 俞伟杨
Original assignee: Lishui Central Hospital
Current assignee: Lishui Central Hospital
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-05-18
Anticipated expiration: 2030-07-03

Abstract

The utility model belongs to the field of medical equipment, concretely relates to nail stick drag hook is used in operation. A nail and rod retractor for posterior lumbar interbody fusion comprises a short handle and a long handle, wherein the short handle is symmetrically arranged on two sides of the long handle, the short handle and the long handle are vertically arranged, and a screw cambered surface is arranged on the short handle; the end part of the short handle on one side is provided with a barb with a downward cambered surface; the end part of the short handle at the other side is provided with a handle plate. When soft tissues around the pedicle screws need to be exposed, the arc surfaces of the screws of the short handles of the rod-nailing drag hook are matched with the screws, when the visual field on the inner side of the linking rod needs to be exposed, the hook-nailing drag hook can be matched with the rod through the barb at the tail end of the short handle, the visual field exposing capability is good, and the damage of the drag hook to the soft tissues such as normal muscles can be reduced; the whole structure is simple, the production is convenient, the exposure is convenient, and the operation wound can be reduced.

Description

Nail and rod retractor for posterior lumbar interbody fusion

Technical Field

The utility model belongs to the field of medical equipment, concretely relates to nail stick drag hook is used in operation.

Background

Clinically, there is an important operation step in the lumbar posterior interbody fusion operation, namely vertebral plate decompression is carried out after the pedicle screws and the pedicle connecting rods are placed. However, the incision for lumbar vertebra surgery is often small, the interference of soft tissues such as muscles causes the restriction of the operation space, the exposure is often difficult when the decompression is carried out, and the difficulty of the surgery is increased. At this time, the operation is often finished by fixing the vertebral plate draw hook on the outer edge of the vertebral plate, so that the operation is often easily over-exposed, soft tissue structures such as normal muscles are damaged, bleeding is increased, and operation steps are increased. The existing method is to pull the soft tissue, which is minimally invasive, but directly aims at the operation of the soft tissue, and still causes larger injury. There is a need for a simple, convenient, low trauma rod and staple retractor for performing lamina exposure that reduces trauma and provides a good surgical field.

Disclosure of Invention

The utility model discloses the technical problem that will solve is: aiming at the defects in the prior art, the nail-rod draw hook for the lumbar vertebra posterior intervertebral fusion with the barb is provided.

In order to realize the purpose of the utility model, the following technical scheme is adopted to realize:

a nail and rod retractor for posterior lumbar interbody fusion comprises a short handle and a long handle, wherein the short handle is symmetrically arranged on two sides of the long handle, the short handle and the long handle are vertically arranged, and a screw cambered surface is arranged on the short handle; the end part of the short handle on one side is provided with a barb with a downward cambered surface; the end part of the short handle at the other side is provided with a handle plate.

As a preferable scheme: the barb is towards the outside, handle board and barb are towards the same direction.

As a preferable scheme: the barb comprises two mutually connected hook heads, and a disassembly groove is formed between the two hook heads.

As a preferable scheme: the hook head bends downwards to form a barb cambered surface.

As a preferable scheme: the shape of the dismounting groove is matched with the outer ring arc surface of the head part of the pedicle screw.

As a preferable scheme: the barb cambered surface of the barb is matched with the pedicle connecting rod.

As a preferable scheme: the arc surface of the screw faces to the outside, the arc-shaped concave surface of the screw arc surface is matched with the surface of the pedicle screw, and the pedicle screw can be placed in the arc surface of the screw.

Compared with the prior art, the beneficial effects of the utility model are that: when soft tissues around the pedicle screws need to be exposed, the arc surfaces of the screws of the short handles of the rod-nailing drag hook are matched with the screws, when the visual field on the inner side of the linking rod needs to be exposed, the hook-nailing drag hook can be matched with the rod through the barb at the tail end of the short handle, the visual field exposing capability is good, and the damage of the drag hook to the soft tissues such as normal muscles can be reduced; the whole structure is simple, the production is convenient, the exposure is convenient, and the operation wound can be reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of embodiment 2 of the present invention;

1. a long handle; 2. a short handle; 3. a screw arc surface; 4. a barb; 5. a handle plate; 6. a hook head; 7. disassembling the groove; 8. a barb cambered surface.

Detailed Description

A detailed description of the embodiments of the present invention is provided below with reference to fig. 1-3.

According to the drawings, the nail and rod retractor for the posterior lumbar interbody fusion comprises a short handle 2 and a long handle 1, wherein the short handle 2 is symmetrically arranged on two sides of the long handle 1, the short handle 2 and the long handle 1 are vertically arranged, and a screw cambered surface 3 is arranged on the short handle 2; the end part of the short handle 2 at one side is provided with a barb 4 with a downward cambered surface; the end part of the short handle 2 at the other side is provided with a handle plate 5, the barb 4 faces the outside, the handle plate 5 and the barb 4 face the same direction, the barb 4 comprises two mutually connected hook heads 6, a dismounting groove 7 is formed between the two hook heads 6, the hook heads 6 bend downwards to form a barb cambered surface 8, the shape of the dismounting groove 7 is matched with the outer ring arc surface of the pedicle screw head, the barb cambered surface 8 of the barb 4 is matched with the pedicle connecting rod, the screw cambered surface 3 faces the outside, the screw cambered surface 3 is an arc-shaped concave surface matched with the surface of the pedicle screw, and the pedicle screw can be placed in the screw cambered surface 3.

Example 1

When the pedicle screw is used, mainly aiming at the pedicle screw and the pedicle connecting rod, the pedicle screw penetrates through the epidermis layer and is driven into the bone, so that the screw thread of the pedicle screw is buried in the bone, and a larger head is positioned above the pedicle screw. The product utilizes the disassembly groove 7 formed by the 2 hook heads 6, the disassembly groove 7 is clamped into the head position of the pedicle screw, the handle plate 5 is held, the pedicle screw is pried by the lever principle, and the soft tissues around the pedicle screw can be exposed immediately.

Example 2

When the soft tissue around the pedicle of vertebral arch connective bar needs to be exposed, the barb 4 can be inserted into the lower part of the pedicle of vertebral arch connective bar, the upward barb cambered surface 8 is formed, the pedicle of vertebral arch connective bar is tilted through the barb cambered surface 8, the soft tissue around the pedicle of vertebral arch connective bar is exposed after the pedicle of vertebral arch connective bar is tilted, the operation has good visual field exposure capability, and the damage of the retractor to the soft tissue such as normal muscle can be reduced.

Claims

1. The utility model provides a way of escape lumbar interbody fusion is with nail excellent drag hook which characterized in that: the screw nail comprises a short handle and a long handle, wherein the short handle is symmetrically arranged on two sides of the long handle, the short handle and the long handle are vertically arranged, and a screw cambered surface is arranged on the short handle; the end part of the short handle on one side is provided with a barb with a downward cambered surface; the end part of the short handle at the other side is provided with a handle plate.

2. The nail and rod retractor for posterior lumbar interbody fusion as claimed in claim 1, wherein: the barb is towards the outside, handle board and barb are towards the same direction.

3. The nail and rod retractor for posterior lumbar interbody fusion as claimed in claim 2, wherein: the barb comprises two mutually connected hook heads, and a disassembly groove is formed between the two hook heads.

4. The nail and rod retractor for posterior lumbar interbody fusion as claimed in claim 3, wherein: the hook head bends downwards to form a barb cambered surface.

5. The nail and rod retractor for posterior lumbar interbody fusion as claimed in claim 3, wherein: the shape of the dismounting groove is matched with the outer ring arc surface of the head part of the pedicle screw.

6. The nail and rod retractor for posterior lumbar interbody fusion as claimed in claim 4, wherein: the barb cambered surface of the barb is matched with the pedicle connecting rod.

7. The nail and rod retractor for posterior lumbar interbody fusion as claimed in claim 1, wherein: the arc surface of the screw faces to the outside, the arc-shaped concave surface of the screw arc surface is matched with the surface of the pedicle screw, and the pedicle screw can be placed in the arc surface of the screw.